Static IP

 IPConfiguring  Address - Linux RedHat 7.x

This help sheet has been developed for students living in CSM Residences and faculty/staff members on the main campus who wish to set up a network connection on their PC running Linux. It describes the basic steps necessary to establish communication between your PC and the Internet using TCP/IP (Transmission Control Protocol/Internet Protocol). The instructions are written for RedHat7.x, but the steps described should be similar for other distributions of Linux.

Visit https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Deployment_Guide/s1-networkscripts-interfaces.html for additional help.

1. Edit your NIC configuration file

Your Location	Gateway	Network	Broadcast	Netmask
Main Campus	138.67.1.1	138.67.0.0	138.67.63.255	255.255.192.0

Log in as root and make the following changes to the ifcfg-eth0 file using a text editor such as pico or vi:

• DEVICE=eth0
• BOOTPROTO=static
• BROADCAST=your broadcast address
• IPADDR=your IP address (Given to you when your port is activated.)
• NETMASK=your netmask
• NETWORK=your network
• ONBOOT=yes
• DNS1=138.67.1.2
• DNS2=138.67.1.3

2. Edit your network configuration file

• NETWORKING=YES
• HOSTNAME=your hostname (Given to you when your port is activated.)
• GATEWAY=your gateway

3. Verify that the changes have taken effect

If you are interested in a more secure connection, look up iptables, which deal with firewalls.

1. Create a file named /etc/sysconfig/network-scripts/ifcfg-eth0 as follows:
2. DEVICE=eth0
3. BOOTPROTO=none
4. ONBOOT=yes
5. PREFIX=24
6. IPADDR=192.168.2.203
7. Restart network service: systemctl restart network

How do I list network interfaces?

Type the following command:

Here is a typical DHCP configration for eth0 (stored in /etc/sysconfig/network-scripts/ifcfg-eth0 file):